Question

the main organ that regulates blood glucose levels is the:
a. kidney
b. liver
c. pancreas
d. small intestine

the chemical messengers sent out of the endocrine system are:
a. enzymes
b. pheromones
c. adrenalin
d. hormones

Explanation:

Identify blood glucose regulator

The pancreas contains endocrine cells in the islets of Langerhans that monitor and regulate blood glucose levels. It secretes insulin to lower blood glucose and glucagon to raise it.

Evaluate first question options

• a. kidney: Filters blood and regulates fluid balance.
• b. liver: Stores glycogen but does not primary-regulate blood glucose levels independently of pancreatic hormones.
• c. pancreas: The primary sensor and regulator via insulin and glucagon.
• d. small intestine: Absorbs nutrients but does not regulate systemic blood glucose levels.

Identify endocrine chemical messengers

The Endocrine System communicates throughout the body by releasing chemical messengers directly into the bloodstream to target distant organs. These specific messengers are called hormones.

Evaluate second question options

• a. enzymes: Biological catalysts for chemical reactions, not systemic messengers.
• b. pheromones: Chemical signals released outside the body to affect other individuals.
• c. adrenalin: A specific hormone, but not the general term for all endocrine messengers.
• d. hormones: The general class of chemical messengers secreted by endocrine glands.

Answer:

Question 1

• a. kidney
• b. liver
• c. pancreas (Correct answer)
• d. small intestine

Question 2

• a. enzymes
• b. pheromones
• c. adrenalin
• d. hormones (Correct answer)